التفاصيل البيبلوغرافية
| العنوان: |
Obscuration beyond the nucleus: infrared quasars can be buried in extreme compact starbursts |
| المؤلفون: |
Andonie C, Alexander DM, Greenwell C, Puglisi A, Laloux B, Alonso-Tetilla AV, Rivera GC, Harrison C, Hickox RC, Kaasinen M, Lapi A, Lopez IE, Petter G, Almeida CR, Rosario DJ, Shankar F, Villforth C |
| المصدر: |
Monthly Notices of the Royal Astronomical Society: Letters, 1 January 2024 |
| بيانات النشر: |
Oxford University Press |
| سنة النشر: |
2024 |
| المجموعة: |
Newcastle University Library ePrints Service |
| الوصف: |
© The Author(s) 2023. In the standard quasar model, the accretion disc obscuration is due to the canonical dusty torus. Here, we argue that a substantial part of the quasar obscuration can come from the interstellar medium (ISM) when the quasars are embedded in compact starbursts. We use an obscuration-unbiased sample of 578 infrared (IR) quasars at z ≈ 1–3 and archival Atacama Large Millimetre/submillimetre Array submillimetre host galaxy sizes to investigate the ISM contribution to the quasar obscuration. We calculate star formation rates (SFR) and ISM column densities for the IR quasars and a control sample of submillimetre galaxies (SMGs) not hosting quasar activity and show that: (1) the quasar obscured fraction is constant up to SFR ≈ 300 M☉ yr−1, and then increases towards higher SFR, suggesting that the ISM obscuration plays a significant role in starburst host galaxies, and (2) at SFR ≳ 300 M☉ yr−1, the SMGs and IR quasars have similarly compact submillimetre sizes (Re ≈ 0.5–3 kpc) and consequently, the ISM can heavily obscure the quasar, even reaching Compton-thick (NH > 1024 cm−2) levels in extreme cases. Based on our results, we infer that ≈10–30 per cent of the IR quasars with SFR ≳ 300 M☉ yr−1 are obscured solely by the ISM. |
| نوع الوثيقة: |
article in journal/newspaper |
| وصف الملف: |
application/pdf |
| اللغة: |
unknown |
| Relation: |
https://eprints.ncl.ac.uk/300344; https://eprints.ncl.ac.uk/fulltext.aspx?url=300344/BB005A8B-0880-42A1-89A4-934526AB81B1.pdf&pub_id=300344 |
| الاتاحة: |
https://eprints.ncl.ac.uk/300344 |
| Rights: |
https://creativecommons.org/licenses/by/4.0/ |
| رقم الانضمام: |
edsbas.F3618284 |
| قاعدة البيانات: |
BASE |